Mechanical stoker.



G. 0. J. KL EVEN. MECHANICAL STOKER. Arrucmon min v.15. ms.

Patented Nov. 27, 191,7.

2 SHEETS-SHEET l- Erg.

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G. '0. J. KLEVEN. MECHANICAL SIOKER. APPLICATION FILED NOV. I5. I916.

PatehtodNov.27, 1911.-

eusrnv o. .1. KLnvnN, or SALT. LAKE CITY, U'IA'H.

Specification of Letters Patent.

MncHAnroAL seem R.

Patented N ov.2'7 1917.

Applicationflle'd November 15,1916. serial N01 181,575.

To all whom it may concern: 1

Beit known that I, GUsrAv O. J. KLEVEN, a citizen of the United States, residing at Salt Lake City, in the county of Salt Lalre and State of v Utah, have invented certaln new and useful Improvements in Mechani-'- cal Stoker's, of which the following is a specification. r

My invention relates to mechanical stok ers, and has for its object to provide a stoker by which coal may be mechanically fed into a boiler furnace and so distributed that better combustion may be secured and thereby greater heat provided under the boiler and less obnoxious gases and smoke esca e from the flue or smoke stacki Tifese and other objects which ar'e 'apparent I accomplish'with my invention which is illustrated in the accompanying drawingsin which similar'letters'and numorals of reference indicate. likeparts throughouiwthe several figures, and asdescribed in the specification forming a part of this a plicatlon and pointed out in the ap ende claims.

mile drama-garland nave Shawna substantial embodiment of my invention,"

Figure 1 is a longitudinal vertical section of the device in place in the boiler furnace. Fig. 2 is an elevation of the front end of a boiler with parts cut away to show the present invention in place under said boiler. Fig. 3 is a plan view of the device. Fig. 4 is a detail of the chain belt links and pivot rods. Fig. 5 is a detail showing the screw feed and portions of the bridge wall.

I am aware that mechanical stokers have been used to feed coal into boiler furnaces, and to introduce the coal at the back of the furnace and mechanically move it forward into the blaze. By means of the present invention I introduce hot air in a novel manner at the front of the fire box to aid combustion. The bridge wall is constructed to sup ort and protect the coal chute and screw feed The present invention consists of two rails 1 upon which the traveling grate may be moved longitudinally, and which are placed at the SldGS and on the floor of the ash box A. The boiler shown at B may be of any type of flue boilers and is mounted upon the ordinary wall in the usual manner. The front doors needed are the cleanout door 0, the door D commonly used for feeding coal into the furnace but which I use only as a convenience in placing my stoker. The

traveling "grate consists of a frame 2 that is mount'e on flange'd wheels 3 which rest upon said rails 1 Two octagonally shaped rollers 5 are journaled on said frame 2, and the shaft of one of them is extended and upon which, is fastened a gear wheel '4 through which motion is imparted to' said rollers 5. A chain belt 0 is carried over said rollers 5, which belt consists of metal links 6 having transverse holes therein, through which'the pivot rods 7 are passed and fas tened. Each of said rods are of suflicient length to form the pivot for all the laterally adjacent links 6 and other parallel rods and links are used to. form a chain the fullwidth of said rollers 5 and of a length suflicien't toencirc'le the tworollers'. The coal is fed onto the saidbelt O'by means-of a screw 8, which is carried and operated ina tubular casing 9. The said casing 9 has spaced apart" walls to'forme water jacket around" said screw 8 and to-protect both the screw and casing from the extreme heat which both are subjected to. The walls of said casin 9 do n t me on th f n S de nd e e t n.ded airidfOlle benFa-t right anglesto form a feed li'aiifiel 10 through which the coal is fed onto the said belt. A water pipe 11 is connected with the interior of said water jacketed wall of said casing through which water is allowed to flow. The bridge wall E is constructed partially around said casing and inclined toward the rear to form a combustion chamber F. Air conduits G and H are provided, each having its ingress extended through the side wall of said boiler furnace and a horizontal ortion 12 of conduit G and 13 of conduit are passed across the furnace fire box near the front end of the said chain belt and spaced above it. In each of said conduits and in the said portions 12 and 13 respectively are provided vertical air tubes 14, through which heat from the fire may pass and by which the air passing through the said conduits Gr and H is heated. The egress ends of said conduits G and H are passed toward the front of the furnace wall and enter said furnace near the front and below the said chain belt 0. A hopper 15 is provided on one end portion of and opening into the interior of said casing 9, through which coal is fed into said casing. The shaft of said screw 8 is extended beyond the said hopper 15, and a gear wheel 16 is secured on said shaft by which motion is imparted to said screw to move coal 9' said belt 0. The operation of my stoker 1s as follows: motion in: med

said gear 16 and gear Wheel 4 an throu h 5 them to the said screw 8 and chaiii coal is supplied in the said hopper and" is 'ilongifiuitimally in saideasing-9.

Some of the coal Will be charged through the said channel 10 onto 10 the-MR9, M 1; Qme visi will bemoved alon W bed e lwzeedfe qth woints. at-Sai vhat way a dmx mea swt v gid cyem qa in and channel L woetiatur m s ng; loge: Q 9211. W111 be fed. mm sa d be t. Th to hea y star ed on the aid! be t. on QWL .lQ-w l e et ied i n a o, the i R QW y51 hl-te gh. e b az aha-sta ate fie d 20 tbs ghsaud condui s and an will u'myalgd thgough. said belt and aid W bnstion. A-poiitmm' h as s Q ndem .fi im cqm iw ln i l fall tbs-le s}! hete' e t :Q a hs ghi en; a d mm some th bale-hoe Willfall at, the front: below the ote. 17;, d ma e ken 5mm. the

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i ollfeiis ouinaled' on said frame; alinkinetal Beltbai'ried over said rollers and With its Iino-of :tmve'l towancktfie front; a casing suq opted by and artially covered by the bri g Wall of the fiirnace and having a dischal e channel longitudinally formed as a portron of the circumference tl ifieo f 'a scigew teed opega hlg, said casing; a hopper on one en portlon of said casing; air conduits supported abombelt and with tho it! Exits. "below and. t th ir and of saidbsylm-audmee s he ro ate said; Mindanao w lw n espwfiiv m 2 A; me hes-m M wimpos ng m" ituslwalflmmwabls- -mme s lle s- 1 moaled on; saidam a gr te bel a ied over said rollers and with its line .01; (gravel wee he inset. mi es; a. w ns-s ppo h Midi w ol y y; the WILMQ; e l: tfiw finesse and a m a di cha g m nasab e s afi n se Mown one end po nt-10;; oisaid easmg; an conduits suppo td'ab mr e w th the ms x be low and of? said belt; ent-ii e l2etetes d t ls-a d aid; SQEQW n hem t s a peie wliswe t m was my =1;

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